Twice a year isn’t overkill, especially if you’re in a spot with big temperature swings or lots of rain. Honestly, I’ve seen plenty of leaks start under boots that looked fine from above—lifting the edge is the only way to catch early rust or cracked seals. Silicone helps, but it’s not a magic fix forever. These things do need more babysitting than folks expect... but a quick check beats a surprise ceiling stain any day.
Can’t argue with that—twice a year seems about right, especially if you’re anywhere with wild weather swings. I used to think once a year was enough until I found a slow leak right where the boot meets the pipe, and the shingles looked fine from above. Now I do spring and fall checks, just to be safe. Silicone is decent for touch-ups, but like you said, it’s not permanent. Honestly, those boots can crack or pull away way faster than you’d expect if you get big temperature changes. It’s a small hassle compared to dealing with water stains or worse... learned that the hard way.
Silicone is decent for touch-ups, but like you said, it’s not permanent.
Couldn’t agree more—silicone’s just a band-aid. I used to trust it until a surprise leak showed up right over my kitchen. Now I swap out the whole boot if I see even a hint of cracking. It’s way less hassle than drywall repair and repainting, trust me. Those temperature swings really do a number on rubber.
You’re spot on about the hassle factor. Once you’ve had water make its way inside, you really don’t want to risk it again. I see a lot of folks try to stretch the life of those rubber boots with a bead of silicone, but honestly, that’s just delaying the inevitable. The real issue is that UV and temperature swings just eat up standard rubber boots, especially on south-facing slopes. If you’re in a spot with harsh winters or brutal summers, that cycle of expansion and contraction will crack them faster than you’d think.
Here’s what I usually recommend: check your boots every spring and fall when you’re already up there clearing gutters or leaves. If there’s any sign of dry rot or splitting, swap it out. It’s maybe a 20-minute job if you’re comfortable on a ladder—way easier than fixing drywall or tracking down a slow leak later. Some people go for the silicone “quick fix,” but in my experience, you’ll be back up there next season anyway.
If you’re tired of swapping them every couple years, look into the newer all-metal or silicone collar boots—they cost more upfront but last way longer. Just my two cents from crawling around too many attics with water stains...
That’s been my experience too—once water sneaks in, it’s a pain to track down and fix all the damage. I’ve tried the silicone bead trick a couple times, but honestly, it just buys you a season or two at best. The UV exposure here in Colorado is brutal, and those black rubber boots start cracking faster than I’d expect, especially on the south side like you mentioned.
One thing I’m curious about: has anyone had luck with those retrofit “repair” collars that clamp over the old boot? I put one on as a stopgap last fall and it’s holding up, but I’m not sure if that’s just delaying the inevitable again. I’ve also noticed the metal boots don’t always fit perfectly with older vent pipes—sometimes you need to tweak them a bit.
For what it’s worth, I started swapping mine out every other year after a nasty ceiling stain. It’s not fun, but it beats dealing with soggy insulation or mold. Anyone else notice the newer silicone ones seem to stay flexible longer? I’m tempted to just bite the bullet and replace all mine next time I’m up there...